Ions Isotopes Chapter 11 Section 2 Reminder Atoms
- Slides: 11
Ions & Isotopes Chapter 11 Section 2
Reminder… • Atoms have a neutral charge because the # of protons = electrons
Charge of An Atom • IF… # of protons Brain. POP Ions = # of electrons the atom becomes an ION • ion – charged particle that forms when an atom or group of atoms gains or loses one or more electrons
Charge of An Atom • If # protons > # electrons = positive charge atom loses electron CATION • If # protons < # electrons = negative charge atom gains electron ANION
Ions CATION (+) • ANION (-) •
Are All Atoms of an Element the Same? • Not Necessarily! – Ions – unequal # of protons and electrons – Isotopes – unequal # of protons and neutrons Brain. POP Isotopes • isotope – atoms with the same number of protons (same element) but with different numbers of neutrons (different masses) • In an isotope: – # of protons always remains the same – # of neutrons changes
Looks of an Isotope Proton Neutron Electron This is a Hydrogen Atom Isotope The isotope has 2 particles which means it has greater mass.
Properties of Isotopes • each element has a limited number of isotopes that occur naturally • isotopes share almost all of the same physical and chemical characteristics • example: oxygen isotopes are colorless, odorless gases at room temperature (physical)
How Can We Tell One Isotope from Another? • each element has a mass number which identifies the isotope of the element. • mass number = protons + neutrons in an atom • mass numbers are typically not found on the periodic table
Naming Isotopes Proton Neutron Electron There is 1 proton and 0 neutrons so the name of this atom is Hydrogen-1 Electron There is now 1 proton AND 1 neutron so the name changes to Hydrogen-2
Atomic Mass vs Mass Number Atomic Mass • atomic mass – the average mass of an atom – average takes into consideration all isotopes for an atom – decimal because it is an average of masses Mass Number • mass number – the sum of the numbers of protons and neutrons in the nucleus of an atom – whole number because it is the exact summation of protons and neutrons – rounded atomic mass
- Atoms and their isotopes pogil
- Chapter 2 atoms molecules and ions
- What do the roman numerals in a cation's name indicate?
- Magnesium and fluorine ionic compound
- Atoms molecules and ions
- Atoms molecules and ions
- Atoms molecules and ions
- Atoms or ions are considered isoelectronic if
- Atoms molecules and ions
- Atoms ions and molecules
- Atoms ions and molecules
- States that atoms ions and molecules must collide to react